11211990

Beam Failure Recovery In Multi-TRP Scenarios

PublishedDecember 28, 2021
Assigneenot available in USPTO data we have
Technical Abstract

Patent Claims
20 claims

Legal claims defining the scope of protection, as filed with the USPTO.

1

1. A method comprising: receiving, by a wireless device, one or more radio resource control (RRC) messages indicating: a first transmission and reception point (TRP) of a cell; a second TRP of the cell; and one or more first beam failure recovery parameters indicating one or more first reference signals for the first TRP of the cell; determining a first beam failure based on the one or more first reference signals, of the first TRP, indicated by the one or more first beam failure recovery parameters; based on the determining, transmitting, via the second TRP of the cell, an uplink signal indicating a link recovery request for the first TRP; receiving an uplink grant for uplink data; and transmit the uplink data indicating a candidate beam of the first TRP.

2

2. The method of claim 1 , wherein the one or more radio resource control (RRC) messages indicates: a first control resource set (coreset) group associated with the first TRP; and a second coreset associated with the second TRP of the cell.

3

3. The method of claim 1 , wherein the uplink signal is transmitted, over a scheduling request (SR) resource of the second TRP, indicating the link recovery request for the first TRP.

4

4. The method of claim 1 , further comprising determining the first beam failure based on: the one or more first reference signals; and a beam failure indication counter for the first TRP.

5

5. The method of claim 1 , wherein the one or more RRC messages indicates one or more second beam failure recovery parameters indicating one or more second reference signals for the second TRP of the cell.

6

6. The method of claim 5 , further comprising determining a second beam failure based on: the one or more second reference signals; and a second beam failure indication counter for the second TRP.

7

7. The method of claim 6 , further comprising transmitting, based on the determining of the second beam failure, a second uplink signal, via the first TRP of the cell, indicating a second link recovery request for the second TRP.

8

8. The method of claim 7 , wherein the second uplink signal is transmitted, over a second scheduling request (SR) resource of the first TRP, indicating the link recovery request for the second TRP.

9

9. The method of claim 1 , further comprising selecting a random access channel (RACH) resource based on a first candidate beam of the first TRP, wherein a second beam failure of the second TRP occurs while the link recovery request is pending.

10

10. The method of claim 9 , further comprising transmitting a physical random access channel (PRACH) via the selected RACH resource.

11

11. A wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive one or more radio resource control (RRC) messages indicating: a first transmission and reception point (TRP) of a cell; a second TRP of the cell; and one or more first beam failure recovery parameters indicating one or more first reference signals for the first TRP of the cell; determine a first beam failure based on the one or more first reference signals, of the first TRP, indicated by the one or more first beam failure recovery parameters; based on the determining, transmit, via the second TRP of the cell, an uplink signal indicating a link recovery request for the first TRP; receive an uplink grant for uplink data; and transmit the uplink data indicating a candidate beam of the first TRP.

12

12. The method of claim 11 , wherein the one or more radio resource control (RRC) messages indicates: a first control resource set (coreset) group associated with the first TRP; and a second coreset associated with the second TRP of the cell.

13

13. The method of claim 11 , wherein the uplink signal is transmitted, over a scheduling request (SR) resource of the second TRP, indicating the link recovery request for the first TRP.

14

14. The method of claim 11 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine the first beam failure based on: the one or more first reference signals; and a beam failure indication counter for the first TRP.

15

15. The method of claim 11 , wherein the one or more RRC messages indicates one or more second beam failure recovery parameters indicating one or more second reference signals for the second TRP of the cell.

16

16. The method of claim 15 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to determine a second beam failure based on: the one or more second reference signals; and a second beam failure indication counter for the second TRP.

17

17. The method of claim 16 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit, based on the determining of the second beam failure, a second uplink signal, via the first TRP of the cell, indicating a second link recovery request for the second TRP.

18

18. The method of claim 1 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to select a random access channel (RACH) resource based on a first candidate beam of the first TRP, wherein a second beam failure of the second TRP occurs while the link recovery request is pending.

19

19. The method of claim 18 , wherein the instructions, when executed by the one or more processors, further cause the wireless device to transmit a physical random access channel (PRACH) via the selected RACH resource.

20

20. A system comprising: a base station; and a wireless device comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the wireless device to: receive, from a base station, one or more radio resource control messages indicating: a first transmission and reception point (TRP) of a cell; a second TRP of the cell; and one or more first beam failure recovery parameters indicating one or more first reference signals for the first TRP of the cell; determine a first beam failure based on the one or more first reference signals, of the first TRP, indicated by the one or more first beam failure recovery parameters; based on the determining, transmit, via the second TRP of the cell, an uplink signal indicating a link recovery request for the first TRP; receive an uplink grant for uplink data; and transmit the uplink data indicating a candidate beam of the first TRP.

Patent Metadata

Filing Date

Unknown

Publication Date

December 28, 2021

Inventors

Yunjung Yi
Esmael Hejazi Dinan
Ali Cagatay Cirik
Hua Zhou
Youngwoo Kwak
Kai Xu

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